The United States hit another milestone on Monday with more than 5 million Americans currently infected with coronavirus. Despite the push to ramp up testing and development of a vaccine, experts continue to propose that if all Americans wear masks, the pandemic could be under control “within weeks” . In the spirit of that mission, a new study was published on Scientific advance is elucidating what type of mask is most effective ̵1; and this could actually compromise efforts to limit COVID-19.
The analysis, performed by researchers at Duke University of Medicine, is based on a “optimal measurement method” that uses a laser beam and a cell phone camera to track the number of droplets emitted by a fish. when the person is wearing a mask. Of the 14 masks, the two that proved the most ineffective were the bandana and what researchers call the neck fleece, also known as the scarf.
The safest respirator, N95, results in a drop infusion level below 0.1%. But masks made of handmade cotton and polypropylene, some made from apron material, have also proved effective, with a drop transmission capacity of 0.1% to 0.4%. A knitted mask produces more drops, from 0.1% to 0.6%. But none of the masks can be compared to the fleece on the neck, capable of transmitting 110% drops (10% higher than not wearing a mask).
Researchers explain how these masks can actually spread more viruses than not wearing one at all. “We found that speaking through some masks (especially the wool in the neck) seemed to scatter the largest droplets into an infinite number of smaller droplets … which explains the apparent increase in number. the amount of drops compared with no mask in that case, ”they wrote. These droplets can be extremely dangerous in terms of transmission. “Considering that smaller particles fly in the air longer than large ones (large drops sink faster), using such a mask can be counterproductive,” they added.
Dr. Amesh Adalja, a senior scholar at the Johns Hopkins Center for Health Security, said the study is an important study that Americans need to consider. “People really don’t understand that not all masking methods are the same, and some are more or less effective,” Adalja said. “And I think when you make these decisions, it’s important to have data behind them.”
Given the rate of droplet transmission from the neck cloth and the neckband, he suggested that Americans stay away from both coatings immediately. “I think they should be neglected, especially when pedestrians have been shown to increase transmission,” Adalja said. “Not all masks are equal. … I think many people are just wearing these veils to test a box and fail to realize that to serve a purpose they need to be effective. “
For those who are still confused about why masks are needed, he notes that asymptomatic spread is one of the most important factors to take note of. “There are a lot of people out there who don’t know they’re infected, and covering their faces is a way to help people make sure there’s some source of control going on,” Adalja said. “If people knew their status, it would be a different story, but the reality of the matter is that most people don’t know if they are infected or not.”
Better testing reduces the need for the mask, Adalja adds. But until then, they are critically important to preventing pandemics. “If we have quick tests that we can know as soon as we step outside if there is an infection, that’s one thing, but we’re not near there,” Adalja said. . “So for now, here’s the measure that we have left.”
For Latest news and updates about coronavirus, follow along at https://news.yahoo.com/coronavirus. According to experts, people over the age of 60 and those with the immunodeficiency continue to be at greatest risk. If you have questions, please consult CDC‘sand Who resource guide.
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